An issue was discovered in Mbed TLS through 3.6.5 and 4.x through 4.0.0. There is a NULL pointer dereference in distinguished name parsing that allows an attacker to write to address 0.
History

Fri, 03 Apr 2026 20:15:00 +0000

Type Values Removed Values Added
First Time appeared Arm
Arm mbed Tls
CPEs cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
cpe:2.3:a:arm:mbed_tls:4.0.0:*:*:*:*:*:*:*
Vendors & Products Arm
Arm mbed Tls

Fri, 03 Apr 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Mbed-tls
Mbed-tls mbedtls
Vendors & Products Mbed-tls
Mbed-tls mbedtls

Thu, 02 Apr 2026 20:30:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference Allowing Arbitrary Memory Write in Mbed TLS

Wed, 01 Apr 2026 23:45:00 +0000

Type Values Removed Values Added
Description An issue was discovered in Mbed TLS through 3.6.5 and 4.x through 4.0.0. There is a NULL pointer dereference in distinguished name parsing that allows an attacker to write to address 0.
Weaknesses CWE-476
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-04-01T00:00:00.000Z

Updated: 2026-04-01T19:24:08.049Z

Reserved: 2026-03-31T00:00:00.000Z

Link: CVE-2026-34874

cve-icon Vulnrichment

Updated: 2026-04-01T19:24:03.915Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-01T19:16:33.390

Modified: 2026-04-03T20:06:34.877

Link: CVE-2026-34874

cve-icon Redhat

No data.